When I switched to a bh breech plug on my v2, I had a similar issue. Their solution was to use the breech plug wrench and basically torque the hell out of it, and back it off. Call them to verify, but that's what they told me. Hope it helps!
Yo! I have not checked velocity but 49.5 grains of aa4350 at factory spec length had me checking if I was hitting same hole or getting a wierd 2 ft away flyer. I definitely was hitting dang near the same hole. I wacked a 4pt whitetail with the lrx. It was maybe a 30 yard shot. Maybe 30. It went...